Stay away from that shop, they ripped you off BIG time. For the 6-cyl engine, even 6 spark plugs and 6 coils do NOT cost more than $300! For example (rmeuropean.com): - Volvo Ignition Coil $70/each. - Bremi Ignition Coil $36/each. You need to find an independent and honest shop that knows something ...

As above... - JB Weld as a temp fix, add cheap regular oil, oil filter. - Don't run engine, do compression test. If a con rod is broken, then you don't have compression in that cylinder. Either new engine from reputable seller like Erie Volvo, or junk the car (a 200K car is worth $500) and buy a "ne...